package cn.wolfcode.luowowo.comment.service.impl;

import cn.wolfcode.luowowo.comment.domain.TravelComment;
import cn.wolfcode.luowowo.comment.query.TravelCommentQuery;
import cn.wolfcode.luowowo.comment.repository.ITravelCommentRepository;
import cn.wolfcode.luowowo.comment.service.ITravelCommentService;
import com.alibaba.dubbo.config.annotation.Service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.*;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.util.StringUtils;

import java.util.Date;
import java.util.List;

@Service
public class TravelCommentServiceImpl implements ITravelCommentService {

    @Autowired
    private ITravelCommentRepository repository;

    @Autowired
    private MongoTemplate template;


    @Override
    public Long getCount(Long travelId) {
        Query query = new Query();
        if(travelId != null){
            query.addCriteria(Criteria.where("travelId").is(travelId));
        }
        //查总数：select count(id) from xxx where ...
        long total = template.count(query, TravelComment.class);
        return total;
    }

    @Override
    public Page query(TravelCommentQuery qo) {

        //repository  mongoTemplate  无法直接查询出page分页数据对象，所以需要自己手动封装

        //拼接条件
        Query query = new Query();
        if(qo.getTravelId() != -1){
            query.addCriteria(Criteria.where("travelId").is(qo.getTravelId()));
        }
        //查总数：select count(id) from xxx where ...
        long total = template.count(query, TravelComment.class);
        if(total == 0){
            return Page.empty();  // 空的分页对象
        }

        //查当前页显示 list：select * from xxx where ... limit ...
        //需要设置分页信息和排序信息
        Pageable pageable = PageRequest.of(qo.getCurrentPage()-1,qo.getPageSize(), Sort.Direction.DESC,"createTime");
        query.with(pageable);
        List<TravelComment> list = template.find(query, TravelComment.class);
        return new PageImpl(list,pageable,total);
    }

    @Override
    public TravelComment save(TravelComment comment) {
        //判断评论id是否为空，不为空则是更新
        if(!StringUtils.hasLength(comment.getId())){
            comment.setCreateTime(new Date());
        }

        //必须处理引用评论
        String refId = comment.getRefComment().getId();
        if(StringUtils.hasLength(refId)){
            //评论的评论
            TravelComment ref = repository.findById(refId).get();
            comment.setRefComment(ref);
        }
        repository.save(comment);
        return comment;
    }
}
